Yes, folks, it’s officially summer now. This year’s Solstice, considered the official start of summer, transpired Friday, June 20, at 7:42 PM PT. We hope you have fun this summer with friends and family. To help ensure those summer adventures remain safe and trouble-free, the CTD Shooters’ Log has prepared a helpful Essential Summer Survival Guide. This is worth reading before you venture away from civilization.
Here are some highlights of the article with links for MORE INFO:
First Aid Kits for Campers
You should never venture outside without a first aid kit close at hand. While exploring the outdoors, all types of accidents can occur—from cuts, scrapes, and burns to broken limbs and severe allergic reactions.
Basic Survival Skills
Basic survival skills are a necessity if you plan to spend any amount of time outdoors. These five tips, plus a how-to on what to pack in a lightweight, basic survival kit will help if you are ever stuck, lost, stranded or injured in the field.
How to Treat Burns
Fireworks, barbeques and campfires — in the summer we are frequently around fire, which increases our chance of getting burned. A first-degree burn is most likely home treatable, while a third degree burn requires immediate medical attention. Learn how to spot the differences between minor and severe burns.
Probably the most popular centerfire rifle round in the Western Hemisphere is the .223 Remington and its metric match, the 5.56x45mm. Though many folks use “.223 Rem” and “5.56×45″ interchangeably, there are some meaningful differences in specifications for the original .223 Rem and the 5.56x45mm cartridge, as adopted by the U.S. military and NATO armies. The default chamber throats are slightly different and the .223 Rem is rated at 55,000 PSI vs. 62,366 PSI for the 5.56x45mm.*
.223 Rem vs 5.56x45mm — Key Differences
There is a truly outstanding, very thorough article on the subject, published by LuckyGunner.com.** This involved extensive testing, with pressure monitors, of 5.56x45mm ammo in .223 Rem chambers. Those tests revealed the peak pressures. Here is one of the ammo test charts:
NOTE: “The observed chamber pressure for Federal XM855 5.56mm ammunition in a .223 Rem chamber exceeded .223 maximum pressures, but not by a massive amount. The ninth shot (the red line) was an underpowered cartridge which exhibited significantly lower velocity and pressure than the other rounds, so it was excluded from the average velocity and pressure numbers for this chamber.”
And if you’re curious, LuckyGunner also fired .223 Rem ammo in a 5.56x45mm NATO-chambered AR15 rifle. As you would expect, the peak pressures were significantly lower, but the .223 Rem ammo still cycled the semi-auto AR-platform rifle perfectly well:
UltimateReloader.com Explains .223 Rem vs. 5.56x45mm
To explain the key differences between the .223 Rem and 5.56x45mm cartridges our friend Gavin Gear of UltimateReloader.com has created a very thorough 12-minute video. This covers the cartridge specifications and explains key considerations for hand-loaders. Gavin also addresses the oft-asked question “Can I shoot 5.56x45mm ammo in my .223 Rem chamber?” Gavin’s video is definitely worth watching. In fact, this is one of the most popular videos Gavin has ever created — it has been watched nearly 4.5 million times on YouTube.
What Exactly Is the 5.56x45mm NATO Cartridge?
The 5.56×45mm NATO is a rimless bottle-necked intermediate cartridge family standardized by NATO with development work by FN Herstal. It consists of the SS109, SS110, and SS111 cartridges. Under STANAG 4172, it is a standard cartridge for NATO forces as well as many non-NATO countries.
Bullet diameter: 5.70 mm (0.224 in)
Maximum pressure (EPVAT): 430.00 MPa (62,366 psi)
Maximum pressure (SCATP 5.56): 380.00 MPa (55,114 psi)
Case length: 44.70 mm (1.760 in)
Rifling twist: 178 mm or 229 mm (1 in 7 in)
Parent case: .223 Remington (M193)
Ammo-Maker Federal Premium Compares .223 Rem and 5.56x45mm
Here is a video from ammo-maker Federal Premium explaining the difference between .223 Remington and 5.56x45mm NATO. Federal states that you may experience excessive pressures when firing a 5.56x45mm in a standard .223 Remington chamber:
One leading gunwriter has addressed the question of shooting 5.56x45mm ammo in .223 Rem chambers. He advocates caution (for more info, SEE pressure tests by LuckyGunner.com):
“I have received a slew of questions — many from first time AR-type rifle buyers — about the .223 Rem and the 5.56×45 mm NATO cartridges. Can I shoot 5.56×45 mm NATO in my .223 and vice-versa? Are these the same cartridge?
Externally, the two cartridge cases are identical. The main differences are that 5.56×45 mm NATO operates at a higher chamber pressure (about 60,000 PSI versus 55,000 PSI on the .223 Rem.) and the 5.56’s chamber is slightly larger than that of the .223 Rem. Also, the throat or leade is longer in the 5.56×45 mm chamber. What does this mean? You should not shoot 5.56×45 mm NATO out of a rifle that is chambered in .223 Rem [with a standard short throat]. And be aware that some .223 Rem ammunition will not reliably cycle through some AR-style .223 Rem rifles, but it usually does. As a matter of fact, I have not encountered any difficulty with current .223 Rem. loads cycling through a 5.56 mm AR-style rifle.” — Mark Keefe, Editor, American Rifleman
* According to the official NATO proofing guidelines, the 5.56×45mm NATO case can handle up to 430.0 MPa (62,366 psi) piezo service pressure. The U.S. SAAMI lists Maximum Average Pressure (MAP) for the .223 Remington cartridge as 55,000 psi (379.2 MPa) piezo pressure with deviation of up to 58,000 psi (399.9 MPa). The chamber for military 5.56×45mm NATO has a longer throat prior to the bullet contacting the rifling which results in lower pressures when firing 5.56×45mm NATO ammunition. If 5.56×45mm NATO is used in rifles chambered for .223 Remington the bullet will be engraving the rifling when chambered. which can increase pressures past SAAMI Max levels. NOTE: The C.I.P. standards for the C.I.P. civilian .223 Remington chamber are much closer to the military 5.56×45mm NATO chamber.
** The full-length LuckyGunner article is well worth reading. It even provides specifications for a number of .223 Rem reamer types, and compares the original .223 Rem, the 5.56x45mm NATO, and the modern .223 Wylde chamberings.
Put the same load in a variety of barrels (with the same length and chamberings) and you’ll see a wide variance in muzzle velocity. In fact, it’s not unusual to see up to 100 fps difference from one barrel to the next. We demonstrated this with a comparison test of Lapua factory ammo.
Chron Testing Lapua Factory Ammo
At our Southern California test range some years ago, we chronographed Lapua 105gr 6mmBR factory ammo in three different 8-twist barrels of similar length. The results were fascinating. Lapua specs this ammo at 2790 fps, based on Lapua’s testing with its own 26″ test barrel. We observed a speed variance of 67 fps based on tests with three aftermarket barrels.
Barrel Velocity Variance
Brand ‘S’ and Brand ‘PN’ were pre-fit barrels shot on Savage actions. Brand ‘K’ was fitted to a custom action. All test barrels were throated for the 100-108 grain bullets, though there may have been some slight variances in barrel freebore. With a COAL of 2.330″, the rounds were “jumping” to the rifling in all barrels.
Among the four barrels, Brand ‘PN’ was the fastest at 2824 fps average — 67 fps faster than the slowest barrel. Roughly 10 fps can be attributed to the slightly longer length (27″ vs. 26″), but otherwise this particular barrel was simply faster than the rest. (Click Here for results of 6mmBR Barrel Length Velocity Test).
IMPORTANT: Results Are Barrel-Specific, Not Brand-Specific
These tests demonstrate that the exact same load can perform very differently in different barrels. We aren’t publishing the barrel-makers’ names, because it would be wrong to assume that ‘Brand X’ is always going to be faster than ‘Brand Y’ based on test results from a single barrel. In fact, velocities can vary up to 100 fps with two identical-spec barrels from the SAME manufacturer. That’s right, you can have two 8-twist, 26″ barrels, with the same land-groove configuration and contour, from the same manufacturer, and one can be much faster than another.
Don’t Demand More Than Your Barrel Can Deliver
We often hear guys lament, “I don’t get it… how can you guys get 2900 fps with your 6BRs and I can only get 2840?” The answer may simply be that the barrel is slower than average. If you have a slow barrel, you can try using more powder, but there is a good chance it may never run as fast as an inherently fast barrel. You shouldn’t knock yourself out (and over-stress your brass) trying to duplicate the velocities someone else may be getting. You need to work within the limits of your barrel.
Factory Ammo Provides a Benchmark
If you have a .223 Rem, 6mmBR, .243 Win, 6.5×47 Lapua, 6.5 Creedmoor, 6.5×55, .308 Win, .30-06 Springfield, or .338 LM Rifle, we recommend you buy a box of Lapua factory-loaded ammo. This stuff will shoot great (typically around half-MOA), and it can give you a baseline to determine how your barrel stacks up speedwise. [Editor’s NOTE: The original test was conducted in 2008. The velocity of current-production Lapua factory ammo might be higher or lower, so your results may vary.]
When you complete a new 6mmBR rifle, it’s definitely smart to get a box of the factory ammo and chronograph it. That will immediately give you a good idea whether you have a slow, average, or fast barrel. Then you can set your velocity goals accordingly. For example, if the factory 6BR ammo runs about 2780-2790 fps in your gun, it has an average barrel. If it runs 2820+ in a 26″ barrel (or 2835 fps in a 28″), you’ve got a fast tube.
In years past, one of our favorite features on the NRA Blog was the Friday Feast Recipe of the Week. In the past, the NRA Blog offered up a new delicious food recipe each Friday. Sadly the Friday Feast has not been updated for quite some time, but you can still see dozens of past Friday Feast recipes with this link:
Today’s featured Friday Feast combines two things we love — Italian pasta and Elk meat. Article author Emily Rupertus shares our passion for pasta: “I love pasta. I can’t get enough of it! So when I came across this Classic Elk Lasagna, I couldn’t resist sharing with you! You have to try this perfect twist on a classic comfort food.” After assembling your Lasagna in a big cast-iron skillet and covering with tin-foil, bake the Elk Lasagna in a 400° oven for 30 minutes. Then remove the foil, add more cheese and continue to bake uncovered for ten more minutes.
Ingredients
1/2 Package of Lasagna Noodles
1 lb Ground Elk Meat (you can substitute ground venison or antelope)
1 Medium Sweet Onion (chopped)
2 Cloves Garlic (chopped)
2 tablespoons Olive Oil
3 Cups Tomato Sauce
32 oz. Ricotta Cheese
1 Cup Parmesan Cheese
1 8 oz. Fresh Mozzarella Cheese (sliced)
2 eggs
The CMP National matches at Camp Perry, Ohio kick off on July 6, 2025 and run through August 9, 2025. The National Matches are open to the public and have offered a wide range of events and matches since 1907. Held annually at Camp Perry, the National Matches include a wide range of events for rimfire rifles, centerfire rifles, and pistols. Listed below are event by category. Click on each discipline below for registration information, detailed match program, and schedule.
These matches are conducted by a partnership of the CMP and Ohio National Guard. Since their inception, the National Matches have become a huge national shooting sports festival with over 4,500 annual participants including many of the world’s best marksmen.
E-Targets at 2025 National Matches — Rimfire and Centerfire
After years of testing, the Civilian Marksmanship Program (CMP) will make full use of eTargets at the 2025 National Rifle Matches at Camp Perry, which run July 20 through August 9, 2025. The advanced Kongsberg eTargets will be used at all Highpower rifle matches, National Trophy Rifle competitions, and Rifle Games events. In addition the eTargets will be used for the Rimfire Sporter Match on July 20 and the National Mid/Long Range Matches in August. The use of eTargets eliminates the need for pit duty, drastically cutting down the duration of each match. “Shooting on eTargets is just a better experience for all competitors” notes Brian Williams, CMP Highpower manager. CLICK HERE to learn more about Camp Perry eTargets.
These matches are conducted by a partnership of the CMP and Ohio National Guard. Since their inception, the National Matches have become a huge, national shooting sports festival with well over 4,500 annual participants. School students and competitors range from beginners to many of the world’s best.
Feel free to contact the CMP Competitions Department at competitions@thecmp.org or (419) 635-2141, ext. 724 or 714 for additional questions.
The NRA Blog ran an feature on Silhouette shooting by NRA Silhouette Program Coordinator Jonathan Leighton. Here are selections from Leighton’s story:
NRA Silhouette Shooting
The loud crack from the bullet exiting the muzzle followed by an even louder ‘clang’ as you watch your target fly off the railing is really a true addiction for most Silhouette shooters. There is nothing better than shooting a game where you actually get to see your target react to the bullet. In my opinion, this is truly what makes this game so much fun.
Metallic Silhouette — A Mexican Import
Silhouette shooting came to this country from Mexico in the 1960s. It is speculated that sport had its origins in shooting contests between Pancho Villa’s men around 1914. After the Mexican Revolution the sport spread quickly throughout Mexico. ‘Siluetas Metalicas’ uses steel silhouettes shaped like game animals. Chickens up front followed by rows of pigs, turkeys, and furthest away, rams. Being that ‘Siluetas Metalicas’ was originally a Mexican sport, it is common to hear the targets referred to by their Spanish names Gallina (chicken), Javelina (pig), Guajalote (turkey) and Borrego (ram). Depending on the discipline one is shooting, these animals are set at different distances from the firing line, but always in the same order.
Before Steel There Was… Barbeque
In the very beginnings of the sport, live farm animals were used as targets, and afterwards, the shooters would have a barbeque with all the livestock and/or game that was shot during the match. The first Silhouette match that used steel targets instead of livestock was conducted in 1948 in Mexico City, Mexico by Don Gonzalo Aguilar. [Some matches hosted by wealthy Mexicans included high-ranking politicians and military leaders].
As the sport spread and gained popularity during the 1950s, shooters from the Southwestern USA started crossing the Mexican border to compete. Silhouette shooting came into the US in 1968 at the Tucson Rifle Club in Arizona. The rules have stayed pretty much the same since the sport has been shot in the US. NRA officially recognized Silhouette as a shooting discipline in 1972, and conducted its first NRA Silhouette Nationals in November of 1972.
Great Video of Silhouette Shooting in Canada with Drone Footage
Now There Are Multiple Disciplines
The actual sport of Silhouette is broken into several different disciplines. High Power Rifle, Smallbore Rifle, Cowboy Lever Action Rifle, Black Powder Cartridge Rifle, Air Rifle, Air Pistol, and Hunter’s Pistol are the basic disciplines. Cowboy Lever Action is broken into three sub-categories to include Smallbore Cowboy Rifle, Pistol Cartridge Cowboy Lever Action, and regular Cowboy Lever Action. Black Powder Cartridge Rifle also has a ‘Scope’ class, and Hunter’s Pistol is broken into four sub-categories. Some clubs also offer Military Rifle Silhouette comps.
Where to Shoot Silhouette
NRA-Sanctioned matches are found at gun clubs nation-wide. There are also many State, Regional, and National matches across the country as well. You can find match listings on the Shooting Sports USA website or contact the NRA Silhouette Department at (703) 267-1465. For more info, visit SteelChickens.com, the #1 website dedicated to Silhouette shooting sports.
Readers often ask “What’s the difference between a Weaver scope rail and a Picatinny Rail?” The answer is not as simple as it seems. The dimensions of a Picatinny Rail should be consistent (from one rail-maker to another), since there IS a government spec. Conversely, there is some variance in “Weaver-style” rails. The width of the groove is the most important difference between Picatinny Rails and Weaver-type rails. “Mil-spec” Picatinny rails will have a grove width of 0.206″ while Weaver rails typically have a narrower, 0.180″ groove width.
Does your rifle have a Weaver Rail or Picatinny Rail? Check the dimensions to be sure.
A while back, Brownells had a helpful GunTech™ Article that discussed the Picatinny Rail vs. Weaver Rail. That article explained:
What are the differences between the ‘Picatinny’ and the ‘Weaver’ systems? The profile of the two systems is virtually identical. Depending on the quality of the machining done by the manufacturer, the two systems should be indistinguishable from the profile. The key difference lies in the placement of the recoil grooves and with width of the grooves. MIL-STD-1913 (Picatinny) grooves are .206″ wide and have a center-to-center width of .394”. The placement of these grooves has to be consistent in order for it to be a true Picatinny MIL-STD system. Weaver systems have a .180” width of recoil groove and are not necessarily consistent in a center-to-center measurement from one groove to the next.
In many instances, a Weaver system has a specific application that it is machined for, so interchangeability is not necessarily an issue. A MIL-STD-1913 system must adhere to the specifications listed above in order for it to be considered MIL-STD, since the military desires uniformity in the recoil grooves to allow for different systems to be mounted on the weapon with no concern for compatibility.
Now, what does this mean? Boiled down, it means that accessories designed for a Weaver system will, in most cases, fit on a Picatinny system. The reverse, however, is probably not the case. Due to the larger recoil groove, Picatinny accessories will not fit a Weaver system. There are, of course, exceptions to every rule, but for a good rule-of-thumb, [full-width] Picatinny won’t fit Weaver, but Weaver accessories WILL fit Picatinny.
Good news for gun owners — we are a step closer to the elimination of the $200 National Firearms Act taxes on suppressors and short-barreled guns. After passage of the Big Beautiful Bill in the House of Representatives, the U.S. Senate Finance Committee officially advanced language to fully repeal the excise taxes imposed under the National Firearms Act (NFA).
Thanks to aggressive advocacy from Gun Owners of America (GOA) and mounting grassroots pressure, the Senate’s version of the “One Big Beautiful Bill” now includes full repeal of the $200 NFA tax on:
This expands the House-passed repeal of the suppressor tax. The bill next heads to the “Byrd Bath” review, where non-budgetary provisions may be stripped, but because the NFA operates primarily as a tax mechanism — given that the Supreme Court held that the NFA is primarily a tax in Sonzinky v. U.S. (1937) — GOA feels strongly that the provision ought to survive.
Erich Pratt, GOA Senior V.P., stated: “The House opened the door — now the Senate is charging through it. The American people have been forced to pay hundreds of dollars and submit to federal gun registration just to own firearms that are protected by the Second Amendment[.] This is a monumental step toward dismantling the ATF’s unconstitutional enforcement regime, and the Senate must finish the job.”
Aidan Johnston, GOA Director of Federal Affairs, added: “The Senate Finance Committee’s move to fully repeal the unconstitutional and archaic National Firearms Act tax on short-barreled firearms and suppressors is the direct result of relentless pressure from GOA’s grassroots and our lobbying efforts on Capitol Hill. The government has no right to tax and register accessories like suppressors or firearms with short barrels.”
One of the most fun things you can do with a firearm is to shoot reactive targets at relatively short ranges. For this kind of shooting, a rimfire gun is the way to go. Recoil is way less so you can transition targets quickly, and the cost of .22 LR ammo is a fraction of the cost of centerfire ammo. Rimfire is a bargain — you can get decent bulk .22 LR ammo for just six cents ($0.06) a round. Even cheap 9mm ammo can cost you twenty-four cents ($0.24) a round or more — that’s four times more expensive than .22 LR!
If you’re looking for a nice .22 LR pistol for gun games, we can recommend the SIG Sauer P322-COMP pistol. Designed for speed, accuracy, and flat shooting (low muzzle flip), this rimfire pistol is ready for competition right out of the box. It comes with a red dot optic, barrel-mounted compensator, slide-mounted racker, good trigger, and high-capacity (20- and 25-rd) magazines. READ P322 Manual.
We think this would be a good choice for fun action pistol matches. One YouTube viewer noted: “I applaud SIG… basically [the P322-COMP is] the first RFPO (Rimfire Pistol Open) factory option for Steel Challenge. Every other gun on the market you have to buy the optic, thumb rest, and compensator.”
SIG P322-COMP — Components and Features Video
NOTE: This 44-second video from SIG Sauer has detailed illustrations of all components with 3D rotation of the pistol so you can see it from all angles.
The SIG SAUER P322-COMP is a competition-ready .22 LR rimfire pistol with class-leading 25+1-round and 20+1-round capacity. It has a threaded barrel equipped with a 2-port compensator and comes with a factory-installed ROMEO Zero Elite Red Dot Optic. The polymer grip features an extended magazine catch, adjustable trigger shoe, sport takedown lever, 1913 rail, and integrated magwell. The Single Action Only hammer-fired action on the P322-COMP is completely enclosed in a two-tone competition alloy slide with a high viz fiber-optic front sight, plus front, rear, and top cocking serrations. The ambidextrous, slide-mounted racker ensures easy slide manipulation. The pistol ships with (1) 20-round magazine and (1) 25-round magazine.
P322-COMP Specs:
Caliber: .22 LR
Capacity: 20+1, 25+1
Barrel length: 4 inches
Sight Radius: 6 inches
Weight (w/magazine): 19.8 oz.
22Plinkster Review of P322-COMP Pistol
Note how fast 22Plinkster can hit multiple targets with this new brake-equipped pistol. No question this rimfire pistol would be fun to shoot on steel targets.
There is an excellent article about primers on the Shooting Times website. We strongly recommend you read Mysteries And Misconceptions Of The All-Important Primer, written by Allan Jones. Mr. Jones is a bona fide expert — he served as the manager of technical publications for CCI Ammunition and Speer Bullets and Jones authored three editions of the Speer Reloading Manual.
This authoritative Shooting Times article explains the fine points of primer design and construction. Jones also reveals some little-known facts about primers and he corrects common misconceptions. Here are some highlights from the article:
Size Matters
Useful Trivia — even though Small Rifle and Small Pistol primer pockets share the same depth specification, Large Rifle and Large Pistol primers do not. The standard pocket for a Large Pistol primer is somewhat shallower than its Large Rifle counterpart, specifically, 0.008 to 0.009 inch less.
Magnum Primers
There are two ways to make a Magnum primer — either use more of the standard chemical mix to provide a longer-burning flame or change the mix to one with more aggressive burn characteristics. Prior to 1989, CCI used the first option in Magnum Rifle primers. After that, we switched to a mix optimized for spherical propellants that produced a 24% increase in flame temperature and a 16% boost in gas volume.
Foiled Again
Most component primers have a little disk of paper between the anvil and the priming mix. It is called “foil paper” not because it’s made of foil but because it replaces the true metal foil used to seal early percussion caps. The reason this little disk exists is strictly a manufacturing convenience. Wet primer pellets are smaller than the inside diameter of the cup when inserted and must be compacted to achieve their proper diameter and height. Without the foil paper, the wet mix would stick to the compaction pins and jam up the assembly process.
Primer Functionality and Primer Types Compared
This video looks at a variety of primer types from multiple manufacturers, foreign and domestic. The video explains the basics of how primers function, and then explains the key characteristics of standard primers, magnum primers, and mil-spec primers (designed for semi-auto rifles).
Yes, folks, it’s officially summer now. This year’s Solstice, considered the official start of summer, transpired Friday, June 20, at 7:42 PM PT. We hope you have fun this summer with friends and family. To help ensure those summer adventures remain safe and trouble-free, the CTD Shooters’ Log has prepared a helpful Essential Summer Survival Guide. This is worth reading before you venture away from civilization.
First Aid Kits for Campers
Barrel Velocity Variance
The 
Metallic Silhouette — A Mexican Import
Before Steel There Was… Barbeque
